Pneumatic release device.



J. W. KMSER.

PNEUMTIC RELEASE DEVICE.

PPUQATION min MAH.

' To all fiowm t may concern JACOB W. KAISEE; or EAST CLEVELAND, omo.

PNEUMATIG RELEASE DEVICE.

Specification of Letters Patent.

y Patented May 16, 1916.

Application. lcd March 16, 1915. Serial No. 14,784.

Be it known that I, yJACOB W. KAISER, a citizen of the United States, residing at East Cleveland, in the county of Cuyahoga and "State of,Ohi0, have invented avcertain new and useful Improvement Vin Pneumatic Release Devices, of which the following is a full, clear,.,and exact description.

This invention relates to a device for use in connection with gas or air pressure lines, as, for instance, in pumping up of a tire, or in any place Where itis desired to release the gas or air when the gas or air has reached a predetermined pressure in the receiver to which the gas or air is supplied.

The object of the intention 'is' to. provide such a' device'that shall be small vin its dimensions so that'it may readily be carried around from piace to place, and'further, to provide such a device which is inexpensive to manufacture. f

Generally speaking, the invention comprises the elements and combinations thereof set forth in the accompanying claims.

Reference should be had to the accompanying drawings'forming a part of this specification, in which- Figure l is a. vertical section through the device; Fig. 2 is a. vertical section with portions of the device removed; Fig. 3 is a top plan vier'.7 of part o f the device; Fig. 4 is,

an elevation with parts in section of a part of the device; Fig. 5 is an elevation of apart of the device; Fig. 6 is aplan View of a part of the device; Fig. 7 is an elevation of a modified form of the device; Fig. S is a plan view of a part of the showing inFig. 7. A

In the pumping of automobile tires, it is very desirable that there be some means of' ascertaining to justwhat degree the tires have been iniiated. Attempts at this are made by pressure exerted by the hand upon the tire, but this is a rather unsatisfactory method, and it is the purpose of the device herein disclosed to provide a means whereby a tire may be pumped to a definite amount. T am aware that devices somewhat of this character have been employed in connection with the usual nipple upon a tire, but such devices hai-'Lz nl proven practical, largely for the reason .iat they are constantly becoming damaged and are subjected to all the wear and tear incident to the running of the car. n

The device of this invention is very small,

in fact it may be conveniently carried in the pocket of a user, so that it may be withhim at all times when he might desire to pump up a tire.

While I have heretofore referred more particularly to the'use of this device as useful in the pumping of automobile tires, it will be understood that I do not confine its use to this particularfield, for the device will be useful in any lconnection wherein it is desired to pump air or gas into some container, and to ceasel pumping ygas or air into the container when a desired pressure has been reached. i 1 represents-the body ofthe device, the

body being provided with la central opening' a central opening 4: which communicates with the opening 2Jin the bodyl.' Associated with the opening 4 o-f the extension 3 is a valve 4a. ,This valve may be of any'pref ferred construction, its function being to prevent the escapeV of air when the presfv sure in passages 2 and 4C is in excess of the pressure in front of the valve 4?.

At oneend, the body is provided with some means by which it may engage Ya threaded coupling. For this purpose I pre. fer to provide a swiveled coupling Vor union, and to fprovide for this T form the lower portion o the body 1 with a recess 5 which lis adapted Vto receive an inturned flange 6 of a union `7 I The lower end vof the body 1 is recessed, as indicated at 8, and is adapted to receive the cylindrical portion 9 'of the union. This cylindrical portion 9 isvthreaded to receive tion 9. This space receives the lower end of the body 1. As heretofore explained, the flange 6 is spun or turned inwardly so as to engage with the groove 5, thus securing the union to the end of the body l, but at the same time permitting relative rotation.

`A bridge 8, which is a thin wall, extends across the lower end of the passage 2 and into. the opening in the gasket associated with the coupling 7. VThis bridge engages the valve stem of the tire to be pumped and unseats the valve of the tire.

At the opposite end of the body l to that which has just been described, the outer surface of the `body is threaded, as indicated at 10, and this end of the body is recessed y an opening' through which 1 some sort ot packing material i5. This packing material seats upon the lower part of the recessed portion llj and terms a closure 'for the end of the opening Z in the hody i.

The pin is spaced from the side. i' s oit the recessed portion oy ineens of o Washer 16, which is provided with extending points that engage with the side Walls, the washer Wall opens/,s ouch as possible to permit the passage of yair under certain conditions, as shoivn in Fig. 6.

Engaging with the threaded portion l() is cap l?, which`r upon a portion of its interior surface. is provided with threads that engage with the threads l0.

The cap et its upper end is provided with entends the pin 113, and between he washer 1G and the head of the cup 1T there is o springn 1.8, which yieldingly urges the packing 1,5 against the bottom of the recessed portion il. The csp is provided withopenings lil vfiich permit the escape of air when the volvo l5 is lifted from its scat.

The body portion l is provided Witl shoulder 20. Surrounding the cody porti l heneeth the cap is a. spring 2l, which rests against the shoulder The hotly portion is prorided with a groove which is adapted to receive a proiection 23 formed upon a ring 24 which surrounds the body portion beneath the cap U3 the ring being free to sl'de up and down upon the body portion. he spring engages the. under sido of the ring 2i, yieldingly pressing this' ring against the under side of the csp i7. The edge at the open end or' the cap is pro vided with o series of notches 25. These notches are ada ited to engage with a ridge 26 formed upon the ring 2e. rEhe enge-gef nient of 'the notches 25 iyith the ridge holds the cap 17 against accidental displacement. rEhe notches 25 are so distributed that they are calibrated with respect to the'spring 18, so that these notches represent pressures et which. the valve l5, will become unseated against the pressure of the ring 18, end

permit the escape oi? sir.

By selecting a proper spring 18, the pressure et which the valve l5 wvill open may he .made practically anyK desi amount. En devices intended for 'use upon :uitoi'eohiles the graduations may entend i570;

t is desirable to provide so such that the csp 1i can-he turned only through one complete revolution, for obviously if the 4: at 28a,

cap is set, for instance.y to the niark 4.0, this is correct for only one p `tion oi'Y the con l?. f therefore, the cap l'f" were turned a complete revolution and a mors-i.y so as to come haelt to the gradusti l) ohviouslj.' the tension of the spring wo i not richt to release the valve et u pressure: et .20 pounds per square inch.

in order to provide for thus lim niet' .in the cop 17,1 cut sway th in the upper port of the cap L so a e plain Walled portion 2l'. Near ti the eap li' there an openi;-` 18. :uid uren the upper portion of the hody l there is :nu opening adapted 'to receive a pin l' senihling the device, the cap li' is urneu until the opening; registers with the op'l` ing,T which receives the pin 935). The ein J is then inserted. in this position the pio l is substantially against the top ot' the iu of the cap ll'. fit least, a. very small niereinent or' thc cap 'li' would bring the pin against the top thereof'. T his ehgagrneiu'; ofthe pin QQ with tic top of cap l? its the inward movement of the mijn and in this position the detcnt in the lower part of cop l?, which is in registry with the holding detcnt i263 at this time, is the detent 'which should receive the highest mark, that is to say.I in the device shown in this application this detent would he marked 100, for lwhen the device yves set in this position the valve 15 would he released when the pressure against it was in excess of pounds tothe square inch.

As the csp 3 7 is turned, the pin Q9 would more through the open or recessed space 27 the cup 17 until the pin Q9 engages with a stop weichbe the top or' the threed upon the inside ci the cap, os indicated in This would arrest further movement of the cop, and so iock its out- *Nerd position. The particular notch 25, which in engagementuf'ith the deten" this time, would he market. fie iowest sure at which the valve l5 would open. in the present instance it would be marked 4G.; representing the fact that the valve 15 under the conditions, would he opened when the pressure was in excess ot' i0 pounds per square inch.

ln Figs. 7 and 8, l have shown a. moditied form of the device of my invention. This comprises a body 30 having et one end a threaded extensionl, and at its opposite end a union 32, this union being in all respects the same as that heretofore described and the construction of the. union end of the body 30 is the same as shown in Fig. The extension 31 is the equivalent of the extension ,3 in Fig. l, and is constructed. in the seine manner.

,From the body 30 there is en extension The body 30 and the extension 33 are each provided With centrally arranged openw ings or conduits, which intersect with each other. The end portion of the projection l23 is threaded and'recessed in the same manner as described with respect to the body 1, and receives a cap 34 which is constructed in all respects simila to the cap 17. Within the cap 3'4 is the stem 35,which is spring seated in exactly the same manner as heretofore descrlbed. There is, however,

a difference in the manner of holding the cap 34 in its adjusted position. The means for holding the cap 34 comprises a spring member 36. This spring -member is provided with a rounded portion 27, which is open and surrounds the extension 33. One end of the spring 36 is securedv to the body 30, as indicated at 38. The opposite end of the spring 36 is provided with a ridge or detent 38, which is adapted to yengage with the notched portion upon the lower portionof the cap 34. It will thus be seen that the spring 36 holds the cap 34 in exactly the same manner. as described with respect to the springQl and ring 24 in the form of my device heretofore described.

The cap 34 is limited in its outward and inward movement in the same manner as described with respect to my prior device.

Having thus described my `invention,what I claim is l. In a device of the character described, the combination with a body member having an opening/therein, said body being recessed around one end of said opening, a

valve cooperating with the opening in the recessed port1on, a cap member having threaded engagement with the body mem` ber, a spring extending between the cap and thevalve, one of said members being provided with a groove closed at both ends and the other with a projection engaging in the groove and adapted-to limit the inward and outward movement of the cap member, and means for retaining the cap in adjusted position between its limits of movement.

2. In a device of the character described, the combination with a body portion having an opening therein, said body being recessed around one end of the opening in the body portion, a valve coperating with the Iopening in the recessed portion, a cap having threaded engagement with the body portion, -aspring extending between the cap andthe valve, said cap having the threads cut away from the upper portion of the interior of the cap, a projection carried by the body portion, said projection being adapted to engage the head of the cap. when the cap is turned to the mostinward position, and adapted to'engage with a stop upon the interior of the cap when the cap is turned'to its most outward position.

In testimony whereof, I hereunto aiiX my signature in the presence of two witnesses.

JACOB W. KAISER. Witnesses:

Al J. HUDSON, C: V. SHURGER. 

